docs: def sync_mptt_tree_fields_from_draft_to_published_post_save(
          sender, instance, **kwargs):
      """
      Post save trigger to immediately sync MPTT tree structure field changes
      made to draft copies to their corresponding published copy.
      """
      mptt_opts = getattr(instance, '_mptt_meta', None)
      published_copy = getattr(instance, 'publishing_linked', None)
      if mptt_opts and published_copy:
          sync_mptt_tree_fields_from_draft_to_published(instance)